Locking device for handles.



C. E. FAIRBANKS.

LOCKING DEVICE FOR HANDLES.

APPLICATION FILED DEC. 10, I914.

Patented Dec. 28, 1915.

IN V EN TOR.

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CHARLES E. FAIRBANKS, OF WEST SPRINGFIELD, MASSACHUSETTS, ASSIGNOR TO GILBERT & BARKER MANUFACTURING COMPANY, OF WEST SPRINGFIELD, MAS- SACHUSETTS, A CORPORATION OF MASSACHUSETTS.

LOCKING DEVICE FOR HANDLES.

Specification of Letters Patent.

Patented Dec. 23, 1915.

Application fil ed December 10, 1914. Serial No. 876,542.

' cation.

This invention relates to locking devices for pump handles. While the invention is capable of general application to handles, it is especially adapted for use with the so called dispensing pumps.

The dispensing pump, in general, com-- prises a pump cylinder, a piston recipr0- cable therein by a rack and pinion, and a crank-handle to turn the pinion. In addition, measuring stops are usually employed with pumps of this class, which are so arranged that any thereof may be swung into the path of a projection on the rack. These stops limit the stroke of the pump piston to ivarious lengths, each of which corresponds to adefinite unit of liquid measure. Such pumps are commonly used. in garages, shops and factories to dispense the various kinds of oils. As usually arranged, these pumps are accessible to many people and, as the operating mechanism is of the simplest character, it is easily possible for unauthorized persons to obtain oil. Accordingly, it is desirable to provide means to prevent any but the rightful persons from operating the pump.

An object of my invention is to provide a locking device adapted to lock the operating handle to the pump frame.

A further object is to provide a device of the class described which is arranged to prevent the disturbing of the lock and, the removal of the operating handle.

One preferred form of my invention is illustrated in the accompanying drawings in which,

Figure 1 is a front elevational view of a portion of a common form of dispensing pump. Fig. 2 is a sectional view taken on the line 22 of Fig. 1 and looking in the direction of the arrows. This view shows the handle locked to the frame of the pump. Fig. 3 is a sectional view of the handle taken on the line 33 of Fig. 2 and looking in the direction of the arrows. Fig. 4 is a view similar to Fig. 3 showing the handle unlocked and free for rotation.

Referring to the drawings, Fig. 1 shows the upper portion of a common form of dispensing pump. The upper portion of the frame is indicated at a which is supported by an integrally formed upright e from the lower frame of the pump. The lower frame, and the cylinder, piston, and measuring stops connected therewith, are not illustrated as they are unnecessary to an understanding of the invention. f is the usual expansion pipe, which also serves as a supporting upright for the member a by reason of the set screw connection shown in Fig. 1. The rod 9 is the customary rod, which bears the measuring stops not shown. The frame a is a. hollow structure, which bridges across the space between the upright e and the expansion pipe 7. Rotatably mounted within this frame on a shaft 0? is a pinion c which meshes with a vertically disposed rack b. The latter is operatively connected to the piston rod of the pump in the usual manner. The shaft (Z has fixed thereon a crankhandle 1 by means of which the rack b may be reclprocated in an obvious manner to operate the pump.

Referring now to Figs. 2 and 4, inclusive, it will be seen that the handle 1 is provided on its sides with webs 1, which extend closely adjacent the frame a and form a channel-shaped pocket 13. Within this pocket and secured to the handle 1 is a lock 2, which has a spring latch 3. Slidably mounted and transversely arranged in the handle 1 is a bolt 4, which has a notch 7 arranged to engage the latch 3, when the parts are in the relative positions shown in Fig. 2. A hole (see Fig. 3) is formed in the inner end of this bolt 4 to receive the free end of a spring 6. The other end of this spring is secured to the look, as shown in Figs. 2 and 4. It is to be noted that the spring 6 prevents the removal of the bolt 4, when the device is in unlocked position, as shown in Fig. 4. Any forward pull on the bolt will cause the upper surface of the hole therein to force the spring 6 against the surface 5 of the handle 1 and thereby prevent removal of the bolt. The handle is secured to the shaft d by an angularly arranged setscrew 11 which extends into the channelshaped pocket 13.

Fig. 4 shows the handle in unlocked position. The spring 6 normally retains the bolt 4: in the retracted position there shown, and the latch 3 bears idly'against the smooth surface of the bolt 4-. When, however, the handle is to be locked, it is brought upwardly until the bolt 4 comes into alinementwith a hole 10 formed in the side of the frame a. The bolt is then pushed into the hole 10, by pressing on the portion protruding from the handle, until the latch 3 snaps into the notch 7 The handle is now locked to the frame a, and it is impossible thereafter to manipulate the rack I). When thehandle is thus locked, the end of the bolt 4 is flush with the outer surface of the "handle. Furthermore, the bolt t closely fits the hole in the handle 1 so that no room is left for the insertion of a picking tool to force back the latch 3. Access to the lock 2 is also prevented since it lies in the pocket '13 closed by the hub for the shaft (Z, the

walls 1, the wall 12, and the bolt l. Therefore, manipulation of either bolt, latch, or lock is prevented. The manner of mounting the handle 1 on the shaft dis such that it also cannot be removed when the handle is locked to the frame. Since the set-screw 11 extends into the pocket 13, it is inaccessible, when the handle is locked, on account of the walls 1 and l2,'which extend closely adjacent to the frame a as already described. It

will, therefore, be seen that my locking device is arranged to prevent the use of the pump by any one not provided with a key. The latter, when applied to the lock 2, withdraws the latch 3 from the notch 7, and the Gopies of this patent may be obtained for frame, to lock said handle and mechanism within said pocket operable by a key from without the pocket, to release said handle, whereby the latter may be turned to actuate said means, said pocket arranged to be entirely closed by said frame, whereby said device and mechanism are inaccessible when the handle is in locked position.

2. A locking device for a pump handle,

comprising, in combination, a frame formed with an opening therein, pump mechanism mounted in said frame, a handle to actuate said mechanism movable adjacent said frame, a pocket formed in said handle open ing toward said frame, a bolt in said comprising, in combination,-a frame formed with an opening therein, a shaft mounted in said frame, pump mechanism operable therefrom, a handle on said shaft formedwith a pocket opening toward said frame, a bolt in said handle and within said pocket adapted to enter said opening to lock said handle, a

lock in said pocket to hold the bolt in locked position, said lock being operable by a key from outside said handle to release saidbolt,

means thereafter to withdraw said bolt fromsaid opening, and means to secure saidhan-' dle to said shaft operable from within said pocket, said pocket arranged to be closed by said frame when the handle is in locked position. I CHARLES E. FAIRBANKS. WVitnes'ses:

F. G. NEAL, H. E. HARTWELL.

five cents each, by addressing the Commissioner of Patents, Washington, D. 0. v 

